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Head crack (small enough to ignore?)
Posted 26 December 2004 - 10:07 PM
Just peen it down and keep the radiator full?
These heads are just a disaster as far as anything is concerned. It's like a couple dropout mechanical engineers got drunk one night and decided to play around in CAD.
Posted 26 December 2004 - 10:17 PM
Unless they are leaking coolant, those are 'normal' looking heads.
Posted 26 December 2004 - 10:47 PM
Posted 26 December 2004 - 11:02 PM
It's a good idea to use a small punch to "flatten" the protruding part a little. This will help reduce the sharp edge, which could potentially get hot and turn into a glow plug.
Posted 26 December 2004 - 11:44 PM
Posted 27 December 2004 - 01:38 AM
re load the first link to see the new pics.
Posted 27 December 2004 - 03:25 AM
I agree. I wouldn't use the second one, although there are some people that would say this one is "normal" too.
Took me awhile to accept those cracks, but they are present in a lot of good running EA82's. I always take them to my machine shop for a second opinion before re-using them. In practice, about half of the cylinder heads from junk motors are worthy of using on a quality rebuild project - if you have reasonably high standards.
good luck, John
Posted 27 December 2004 - 04:06 AM
the last head job i did was a porting of turbo heads. there were cracks between the valves of both heads. cracks between the valves are a normal feature on most any ea82 head, even carb and spfi. there is no passages between the valves its all meat.
i see your concern with the crack inside the valve chamber, but on the heads that i ported the cracks went all the way down to the valve guide. i used these heads anyway, since there was no problem with them on the motor we took them from(bad rod bearing) since then the heads have seen over 10,000 miles, including a trip cross country, and built up on a carb block for 8.5 compression
i would not worry about the cracks, but you mat want to take some preventative measures like peening them shut, drilling some relief holes, or driving in a pin to fill them, stake the valve seats in
the only problem the cracks can lead to is if they expand too large it may drop a valve seat.
pull off any known good ea82 turbo head that is in perfect working order and i bet you will find these cracks on nearly all of them
Posted 27 December 2004 - 04:14 AM
The severity of these made me think it was more of a problem and less of a "EA82 nuiance."
Just glad my EG33 didn't have cracks like that when I tore it down
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